The basic steps to pull an espresso shot

Pulling a shot means running hot water through ground coffee under pressure. The machine forces 9 bars of pressure (about 130 pounds per square inch) through a puck of finely ground coffee held in a basket. Water enters at the top, coffee and crema exit the spout at the bottom, and the whole process takes 25 to 30 seconds. The result is a small, concentrated cup of coffee — usually 1 to 2 ounces — with a layer of foam on top called crema.

Every espresso machine has the same core parts: a group head (where the basket attaches), a portafilter (the handle that holds the basket), a steam wand, and a pump. The steps are always the same, but the details change depending on whether your machine is manual, semi-automatic, or fully automatic. Most home machines are semi-automatic, meaning you start and stop the shot by hand.

Key Takeaways

  • Grind your beans when ready before pulling a shot, using a burr grinder set to espresso fineness, which is much finer than drip coffee.
  • Tamp the ground coffee into the basket with firm, level pressure — about 30 pounds of force — to create an even puck that water cannot rush through.
  • Lock the portafilter into the group head, start the pump, and stop it when you have pulled 1 to 2 ounces of liquid, which usually takes 25 to 30 seconds.
  • The first drops should come out slowly and dark; if they spray or gush, your tamp was too light or your grind was too coarse.
  • Clean the basket and portafilter when ready after each shot, before the coffee dries and hardens inside.

Grinding and dosing the coffee

Grind your beans when ready before pulling a shot. Espresso requires a burr grinder — not a blade grinder — because the grind must be uniform and very fine. A blade grinder produces uneven pieces, some powder and some chunks, which will not extract evenly. Burr grinders crush beans between two rotating surfaces and let you dial in the exact fineness.

Set the grinder to espresso fineness, which is much finer than drip coffee but not as fine as powder. The beans should look like wet sand. Start with a medium setting and adjust from there. If your shots pull too fast (under 20 seconds), grind finer. If they pull too slow (over 35 seconds), grind coarser.

Dose the basket with the amount of ground coffee the basket is designed to hold. Most single-shot baskets hold 7 to 9 grams; double-shot baskets hold 14 to 20 grams. Your machine manual will tell you the correct dose. Fill the basket slightly overfull, then level it off with your finger or a distribution tool.

Tamping the coffee into the basket

Tamping means pressing the ground coffee down into the basket with a tool called a tamper. A tamper is a flat disc on a handle, usually made of metal or wood. The goal is to compress the coffee into a level, even puck so that water cannot find a weak path through it.

Place the portafilter on a flat surface. Hold the tamper level and press down with about 30 pounds of force — roughly the weight of a small child leaning on your hand. Press straight down, not at an angle. You should feel resistance. Lift the tamper straight up without twisting. The puck should be level and smooth, with no cracks or gaps.

Uneven tamping is one of the most common mistakes. If one side of the puck is compressed more than the other, water will rush through the softer side and your shot will taste sour and pull too fast. Practice until your tamp is level every time. Some machines come with a tamper; others require you to buy one separately.

Locking in the portafilter and starting the pump

Wipe the group head with a damp cloth to remove old coffee grounds and water. Lock the portafilter into the group head by inserting it at an angle and twisting it clockwise until it is tight. The spout should point into your cup or shot glass.

Turn on the pump or press the button to start the shot. On a semi-automatic machine, you control when the pump starts and stops. On a fully automatic machine, the pump runs for a preset time. On a manual machine, you pull a lever to build pressure.

The first liquid to come out should be dark and come out slowly, drop by drop. This is called the pre-infusion phase. If liquid sprays or gushes out when ready, your tamp was too light or your grind was too coarse. If nothing comes out for several seconds, your tamp was too hard or your grind was too fine.

Pulling the shot to the right volume

Watch the liquid flowing from the spout. After the first few drops, the flow should become steady and dark brown. The crema — the tan foam on top — should build up in your cup. Keep the pump running until you have pulled 1 to 2 ounces of liquid. For a single shot, aim for 1 ounce. For a double shot, aim for 2 ounces.

The easiest way to measure is to use a scale. Place your cup on a scale, tare it to zero, and stop the pump when the scale reads 1 or 2 ounces. Without a scale, you can estimate by watching the cup fill. A single shot is roughly the size of a shot glass; a double shot is roughly twice that.

The whole shot should take 25 to 30 seconds from the moment you start the pump to the moment you stop it. If it pulls faster, your grind is too coarse or your tamp is too light. If it pulls slower, your grind is too fine or your tamp is too hard. Adjust the grind first, then the tamp.

Reading the shot and adjusting your technique

A well-pulled shot has three layers: dark liquid at the bottom, a middle layer of brown liquid, and a layer of tan crema on top. The crema should be thick enough to hold a small amount of sugar on its surface without sinking. If the crema is thin or absent, the shot pulled too fast. If the crema is very dark or burnt-looking, the shot pulled too slow.

Taste the shot. It should be balanced — not sour, not bitter, not thin. Sour shots pull too fast, which means your grind is too coarse or your tamp is too light. Bitter shots pull too slow, which means your grind is too fine or your tamp is too hard. Thin shots lack body and crema, which usually means under-dosing or under-tamping.

Keep notes of your grind setting, dose, tamp pressure, and pull time. Over several shots, you will learn how your machine responds to small changes. Most machines reach a sweet spot after a few adjustments, and then you can repeat the same steps every time.

Cleaning the basket and portafilter

Remove the portafilter from the group head when ready after the shot finishes. Knock the spent puck out of the basket into a knock box or trash can. Rinse the basket and portafilter under hot running water while the coffee is still wet. Use your finger or a small brush to scrub away any remaining grounds.

Dry the portafilter with a cloth. Wet coffee left inside will harden and become difficult to remove. If you let it dry, you will have to soak the basket in hot water for several minutes to loosen it.

Run water through the group head for a few seconds to flush out any grounds that may have lodged inside. This keeps the group head clean and prevents old coffee from mixing with your next shot.

Frequently Asked Questions

What does crema mean and why does my shot not have much?

Crema is the tan foam that sits on top of a shot. It forms when hot water forces carbon dioxide out of the coffee grounds under pressure. Thin or missing crema usually means the shot pulled too fast — your grind is too coarse, your dose is too light, or your tamp is too soft. Try grinding finer or tamping harder on your next shot.

How do I know if my grind is right?

The shot should take 25 to 30 seconds from start to finish. If it pulls in under 20 seconds, grind finer. If it takes over 35 seconds, grind coarser. Taste also matters: sour shots usually need a finer grind, and bitter shots usually need a coarser grind. Adjust one setting at a time so you can tell what made the difference.

Can I reuse the same grounds for a second shot?

No. Once you have pulled a shot, the grounds are spent — the water has extracted the soluble flavors. A second shot through the same puck will taste weak and sour. Always use fresh grounds for each shot.

Why does my machine leak water from the group head?

Leaking usually means the portafilter is not locked in tightly, or the group head gasket (a rubber ring inside) is worn out. Try twisting the portafilter clockwise harder. If it still leaks, the gasket may need replacement — check your machine manual for the part number and how to swap it.

Do I need to warm up my machine before pulling a shot?

Yes. Turn on the machine and let it run for 5 to 10 minutes before pulling your first shot. The group head, basket, and portafilter need to reach the correct temperature. If you pull a shot on a cold machine, the water will cool as it passes through the basket and your shot will taste sour.